A Modular Built-in Permanent Magnet Motor Rotor Structure

A technology of rotor structure and permanent magnet motor, which is applied in the direction of magnetic circuit shape/style/structure, magnetic circuit rotating parts, magnetic circuit, etc., can solve the problems of output torque decrease, motor efficiency decrease, torque ripple increase, etc. Achieve the effect of reducing torque ripple, reducing core loss and improving torque density

Active Publication Date: 2018-04-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unreasonable embedded permanent magnet slots and rotor magnetic circuit design often backfire, resulting in magnetic circuit saturation, reduced motor efficiency, reduced output torque, increased torque ripple, back EMF distortion, etc.

Method used

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  • A Modular Built-in Permanent Magnet Motor Rotor Structure
  • A Modular Built-in Permanent Magnet Motor Rotor Structure
  • A Modular Built-in Permanent Magnet Motor Rotor Structure

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] Such as Figure 1-4 As shown, the present invention is a modular built-in permanent magnet motor rotor structure. The rotor is set in the stator 4 and is composed of several rotor sector modules 1 embedded with permanent magnets 3 through connecting parts 2.

[0021] The rotor sector module 1 occupies a rotor angle of α = 120° / p ~ 170° / p; the rotor sector module 1 is formed by laminating silicon steel sheets, and there are "eight" shaped holes in the laminations. slot; two permanent magnets 3 with opposite polarities are placed in the "eight" shaped slot. The rotor sector module 1 is provided with three concave buckle slots, and 2p (where p is the number of pole pairs) rotor sector modules 1 can be spliced ​​into a rotor through the connecting piece 2 .

[0022] The connector 2 has 2p slots matching the rotor sector module, the slots a...

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Abstract

The invention discloses a modular built-in permanent magnet motor rotor structure. 2p (p is the motor pole pair number) sector module units embedded with permanent magnets are joined via a connection piece to form the rotor; each sector module is formed by laminating silicon steel sheets; the laminated sheet is provided with a splayed groove; the groove is internally provided with permanent magnets with opposite polarities; the edges of the sector module contacted with the connection piece are provided with inward concave buckle grooves; the connection piece is made of non magnetic conducting material, and the edges of the connection piece contacted with the sector modules are provided with outward convex buckles. Compared with the existing built-in permanent magnet motor, the modular built-in permanent magnet motor rotor structure of the invention has the advantages that the magnetic leakage of the permanent magnet is reduced, the air gap magnetic flux density waveform is improved, the salient rate is increased, the motor efficiency and the power density are improved, the torque ripple is reduced, the production process is simplified, mass standardized production is realized, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a rotor structure of a permanent magnet motor, in particular to a rotor structure of a modular built-in permanent magnet motor, belonging to the technical field of motors. Background technique [0002] Permanent magnet motors have remarkable characteristics such as high power density, high efficiency, and high reliability, and have been widely used in the fields of production and life. Due to the shortage of rare earth permanent magnet resources, the cost of permanent magnet materials has become a bottleneck for the large-scale application of permanent magnet motors. Therefore, the optimal design of the permanent magnet motor structure and the improvement of its power and torque density have become a research topic for experts and scholars at home and abroad. [0003] Since the permanent magnets of the built-in permanent magnet motor are embedded in the rotor, the rotor has a protective effect on the permanent magnets, and at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27
CPCH02K1/276
Inventor 林明耀徐磊
Owner SOUTHEAST UNIV
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